Database Software

hi,

i would like to understand the behaviour of this view, during REDO APPLY or real time apply using standby redo log configuration. as in my db, when there is a apply in progress i see the status column having value ACTIVE and DBID column has value of standby DBID where the apply is in progress and then status column goes to UNASSIGNED value and DBID column has no value inside it....i mean blank......why is this so? request you to please help me to understand this....following is the log

SQL> select * from v$standby_log;

GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
7 UNASSIGNED 1 0 104857600 512 0 NO UNASSIGNED
8 3903727333 1 58534 104857600 512 338944 YES ACTIVE 2.3217E+10 05-JAN-12 2.3217E+10 05-JAN-12 2.3217E+10 05-JAN-12
9 UNASSIGNED 1 0 104857600 512 0 NO UNASSIGNED
10 3903727333 2 38929 104857600 512 235008 YES ACTIVE 2.3217E+10 05-JAN-12 2.3217E+10 05-JAN-12 2.3217E+10 05-JAN-12
11 UNASSIGNED 2 0 104857600 512 0 NO UNASSIGNED
12 UNASSIGNED 2 0 104857600 512 0 NO UNASSIGNED

6 rows selected.

SQL> /

GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
7 UNASSIGNED 1 0 104857600 512 0 NO UNASSIGNED
8 UNASSIGNED 1 0 104857600 512 0 NO UNASSIGNED
9 UNASSIGNED 1 0 104857600 512 0 NO UNASSIGNED
10 UNASSIGNED 2 0 104857600 512 0 NO UNASSIGNED
11 UNASSIGNED 2 0 104857600 512 0 NO UNASSIGNED
12 3903727333 2 38931 104857600 512 5120 YES ACTIVE 2.3217E+10 05-JAN-12 2.3217E+10 05-JAN-12 2.3217E+10 05-JAN-12